Manufacturing method of quarter-wave plate for temperature compensation

Abstract

The invention discloses a manufacturing method of a quarter-wave plate for temperature compensation of an optical fiber current transformer, which can realize stability and consistency of a current ratio difference of the optical fiber current transformer in a full-temperature range in a batch production process, reduce a reject ratio of products and ensure long-term working accuracy and stabilityof the optical fiber current transformer. The method comprises the following steps: (1) establishing an optical fiber current transformer mathematical model; (2) measuring phase retardation of an elliptical core optical fiber; and (3) carrying out a quarter-wave plate manufacturing process. The method have advantages that a manufacturing process scheme of the quarter-wave plate is stable and consistent, and the stability and consistency of the current ratio difference of an optical fiber current transformer system in the full-temperature range can be realized so that performance and a yield of the optical fiber current transformer system are improved.

Description

technical field [0001] The invention belongs to a method for manufacturing components in an optical fiber current transformer, in particular to a method for manufacturing a quarter-wave plate used for temperature compensation of an optical fiber current transformer. Background technique [0002] Fiber optic current transformer is a kind of current measuring equipment based on Faraday effect, which has the advantages of good insulation, high reliability and strong anti-electromagnetic interference ability. Compared with traditional electromagnetic current transformer, the measurement range of fiber optic current transformer is Large and wide response frequency, it has obvious advantages in the measurement of DC current, the grid connection of intermittent power supply and the application of UHV AC transmission. Current transformers have irreplaceable status and broad market prospects in the new generation of intelligent substations. [0003] At present, the system structure ...

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Problems solved by technology

[0005] Aiming at the defect of poor temperature stability of optical fiber current transformers, domestic and foreign scholars have proposed various temperature compensation schemes. These methods are aimed at local temperature monitoring of optical fiber current transformers, so as to establish a simplified dynamic temperature model and analyze the influence of temperature. and compensate for it

This method undoubtedly increases the process in the mass production process, and the effect of temperature compensation is also affected by the temperature performance of the transformer before compensation

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